Using tanned leather waste to derive biochars for supercapacitor electrodes in various electrolytes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10491979" target="_blank" >RIV/00216208:11320/24:10491979 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/70883521:28610/24:63582399 RIV/61989100:27710/24:10256905 RIV/60461373:22810/24:43930178

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=f838IVKi9v" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=f838IVKi9v</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s13399-024-06348-w" target="_blank" >10.1007/s13399-024-06348-w</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Using tanned leather waste to derive biochars for supercapacitor electrodes in various electrolytes

Popis výsledku v původním jazyce

Chromium-tanned pigskin leather was carbonized in three ways: (1) pyrolysis in an inert atmosphere at 800 degrees C, (2) pre-carbonization at 500 degrees C followed by the activation with KOH at 800 degrees C, and (3) direct activation with excess KOH at 800 degrees C. The yield of biochars was comparable, 24-28 wt.%. The elemental composition of derived biochars and the content of inorganic elements in ash were determined, and the predominance of chromium and iron was discussed. The changes in the molecular structure after carbonization were assessed with the help of FTIR and Raman spectra. The KOH activation increased specific surface area and porosity but had minimal impact on conductivity. The electric conductivity of powders was determined as a function of applied pressure, achieving a value of approximately 1 S cm-1 at 10 MPa. The electrochemical performance was evaluated using aqueous electrolytes (1 M Na2SO4 and 6 M KOH), as well as an organic electrolyte (1 M tetraethylammonium tetrafluoroborate in acetonitrile, TEABF4/ACN). The highest specific capacitance achieved was 187.7 F g-1 in 6 M KOH using the three-electrode system. Biochar was also tested in a symmetrical supercapacitor, achieving a specific capacitance of 150.9 F g-1 in 6 M KOH, and maintaining 95% capacitance after 5000 charge/discharge cycles. The supercapacitor in 6 M KOH showed the highest power density of 10.5 kW kg-1, whereas the one in 1 M TEABF4/ACN demonstrated the highest energy density of 21.3 Wh kg-1.

Název v anglickém jazyce

Using tanned leather waste to derive biochars for supercapacitor electrodes in various electrolytes

Popis výsledku anglicky

Chromium-tanned pigskin leather was carbonized in three ways: (1) pyrolysis in an inert atmosphere at 800 degrees C, (2) pre-carbonization at 500 degrees C followed by the activation with KOH at 800 degrees C, and (3) direct activation with excess KOH at 800 degrees C. The yield of biochars was comparable, 24-28 wt.%. The elemental composition of derived biochars and the content of inorganic elements in ash were determined, and the predominance of chromium and iron was discussed. The changes in the molecular structure after carbonization were assessed with the help of FTIR and Raman spectra. The KOH activation increased specific surface area and porosity but had minimal impact on conductivity. The electric conductivity of powders was determined as a function of applied pressure, achieving a value of approximately 1 S cm-1 at 10 MPa. The electrochemical performance was evaluated using aqueous electrolytes (1 M Na2SO4 and 6 M KOH), as well as an organic electrolyte (1 M tetraethylammonium tetrafluoroborate in acetonitrile, TEABF4/ACN). The highest specific capacitance achieved was 187.7 F g-1 in 6 M KOH using the three-electrode system. Biochar was also tested in a symmetrical supercapacitor, achieving a specific capacitance of 150.9 F g-1 in 6 M KOH, and maintaining 95% capacitance after 5000 charge/discharge cycles. The supercapacitor in 6 M KOH showed the highest power density of 10.5 kW kg-1, whereas the one in 1 M TEABF4/ACN demonstrated the highest energy density of 21.3 Wh kg-1.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Biomass Conversion and Biorefinery

ISSN

2190-6815

e-ISSN

2190-6823

Svazek periodika

Neuveden

Číslo periodika v rámci svazku

November 2024

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

15

Strana od-do

—

Kód UT WoS článku

001405192000001

EID výsledku v databázi Scopus

2-s2.0-85210581886